Double-chain type sulfated compounds having acid degradability and process for producing the same

Abstract

Described herein are sulfated compounds represented by the formula (I): <IMAGE> (I) wherein X respectively represent -OSO3M or a hydroxyl group and at least one of X represents -OSO3M, a process for producing the sulfated compounds and a process for decomposing the sulfated compounds in an aqueous acid solution.

What is claimed is: 
     
       1. A sulfated compounds represented by the formula (I): ##STR11## wherein X respectively represents --OSO 3  M or a hydroxyl group and at least one of X represents --OSO 3  M; Ra and Rb may be the same or different and respectively represent a R 1  (OR 2 ) z  group which bonds to a carbon atom at the 2-position constituting a 1,3-dioxane ring;   R 1  represents a linear chain or branched alkyl or alkenyl group having 1 to 22 carbon atoms, and may contain an aromatics in a structural formula;   R 2  represents an alkylene group having 2 to 4 carbon atoms;   z represents an integer of 0 to 20 as an average value; and   M represents a hydrogen atom, an alkaline metal, ammonium, a mono-, di- or trialkanol ammonium having 2 to 3 carbon atoms, an alkyl-substituted ammonium having 1 to 5 carbon atoms or a basic amino acid group.   
     
     
       2. A process for producing the sulfated compounds of claim 1, which comprises sulfating a diol having a 1,3-dioxane ring represented by the formula (II): ##STR12## with a sulfating agent. 
     
     
       3. The process for producing the sulfated compounds of claim 2, wherein the compound of the formula (II) is a compound obtained by reacting a long-chain ketone compound represented by the formula (III): ##STR13## with pentaerythritol in the presence of an acid catalyst. 
     
     
       4. A process for decomposing the compound (I) of claim 1, which comprises adding an acid in an aqueous solution containing the compound (I) to acidify the aqueous solution, thereby decomposing the compound (I) into a ketone and a sulfated diol. 
     
     
       5. Sulfated compounds of claim 1, in which Ra is a methyl group and Rb represent a R 1  (OR 2 ) z  group which bonds to a carbon atom at 2-position constituting a 1,3-dioxane ring; R 1  represents a linear chain or branched alkyl or alkenyl group having 6 to 22 carbon atoms, and may contain an aryl group in a structural formula; R 2  represents an alkylene group having 2 to 4 carbon atoms; z represents an integer of 0 to 20 as an average value.